//
//  Account.swift
//  SinaWeibo
//
//  Created by yhlun on 15/11/10.
//  Copyright © 2015年 yhlun. All rights reserved.
//

import UIKit

class Account: NSObject,NSCoding {
    
    //用于调用access_token，接口获取授权后的access token。
    var access_token: String?
    
    //access_token的生命周期，单位是秒数
    var expires_in: NSTimeInterval = 0 {
    
        didSet {
        
            expires_date = NSDate(timeIntervalSinceNow: expires_in)
        }
    }
    
    //过期日期  开发者的过期时间是五年 普通用户三年
    var expires_date: NSDate?
    
    //当前授权用户的UID
    var uid: String?
    
    //用户头像地址 String
    var avatar_large: String?
    
    //用户名
    var name: String?
    
    
    //KVC设置初始值
    init(dict: [String : AnyObject]) {
        super.init()
        
        setValuesForKeysWithDictionary(dict)
    }
    
    override func setValue(value: AnyObject?, forUndefinedKey key: String) { }
    
    override var description: String {
        let keys = ["access_token","expires_in","uid","avatar_large","name","expires_date"]
        return dictionaryWithValuesForKeys(keys).description
    }

    //保存对象
    func saveAccount() {
        
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        
        NSKeyedArchiver.archiveRootObject(self, toFile: path)
        
        print(path)
    }
    
    //对外提供解归档方法
    //func  是一个对象方法  函数前 加 class
    class func loadAccount() -> Account? {
        //解归档     给string对象变成路径的这个方法 在 swift2.0  被搞丢了
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        
        if let account = NSKeyedUnarchiver.unarchiveObjectWithFile(path) as? Account {
            
            if account.expires_date?.compare(NSDate()) == NSComparisonResult.OrderedDescending {
            return account
            }
        }
        
        return nil
    }
    
    
    //MARK: 实现NSCoding 协议方法
    
    //解归档  将 磁盘中的二进制数据 转换成自定义对象 跟反序列化很像
    required init?(coder aDecoder: NSCoder) {
        access_token = aDecoder.decodeObjectForKey("access_token") as? String
        expires_in = aDecoder.decodeDoubleForKey("expires_in")
        uid = aDecoder.decodeObjectForKey("uid") as? String
        avatar_large = aDecoder.decodeObjectForKey("avatar_large") as? String
        name = aDecoder.decodeObjectForKey("name") as? String
        expires_date = aDecoder.decodeObjectForKey("expires_date") as? NSDate
    }
    
    //归档 将对象转换二进制保存到磁盘中 序列化
    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeObject(access_token, forKey: "access_token")
        aCoder.encodeDouble(expires_in, forKey: "expires_in")
        aCoder.encodeObject(uid, forKey: "uid")
        aCoder.encodeObject(name, forKey: "name")
        aCoder.encodeObject(avatar_large, forKey: "avatar_large")
        aCoder.encodeObject(expires_date, forKey: "expires_date")
        
    }
    
    
}
